EIP-1559 Definition: EIP-1559 is an Ethereum upgrade, activated in August 2021, that replaced the fee auction with a base fee set by the protocol and burned, plus an optional tip paid to the block producer. The base fee rises or falls by up to 12.5% per block depending on how full the previous block was, which makes fees more predictable and permanently removes ETH from circulation.
What Is EIP-1559?
EIP stands for Ethereum Improvement Proposal, the formal document process used to change the network. EIP-1559, co-authored by Vitalik Buterin and others in 2019, went live on 5 August 2021 as part of the London hard fork.
Before London, Ethereum fees worked as a blind auction. Every user guessed how much to bid, validators took the highest bids, and anyone who guessed too low waited or failed. Fees jumped unpredictably, and users routinely overpaid just to be safe.
EIP-1559 replaced that guessing game with a posted price. To see why it also changed the supply of ETH, you need to follow how the fee is set and where the money goes.
How Does EIP-1559 Work?
Each block now has a target size and a maximum size twice as large; at launch these were 15 million and 30 million units of gas. The protocol sets a base fee for every block based on the one before. If the last block was completely full, the base fee rises by 12.5%. If it was empty, the fee falls by 12.5%, and anything in between adjusts proportionally.
The base fee is burned, destroyed permanently rather than paid to anyone. On top of it, you can add a priority fee, or tip, which goes to the validator and buys you a place ahead of other users. Your wallet also sets a max fee, the most you will pay per unit of gas, and the protocol refunds the difference between that cap and what you actually owe.
Suppose the base fee is 30 gwei, you set a 2 gwei tip and a 50 gwei max fee, and you send ETH using 21,000 gas. You pay 32 gwei per unit, or 0.000672 ETH in total. Of that, 0.00063 ETH is burned and 0.000042 ETH goes to the validator, while the unused 18 gwei per unit stays in your wallet. If the next block fills up completely, its base fee rises to 33.75 gwei, and several full blocks in a row compound quickly, which is how gas wars push fees up within minutes.
EIP-1559 vs. the Old Fee Auction
| After EIP-1559 | Before EIP-1559 | |
|---|---|---|
| How the price is set | Protocol calculates a base fee each block | Users bid, highest bids win |
| Where the fee goes | Base fee burned, tip to validator | Entire fee to the miner |
| Block size | Flexible, up to twice the target | Fixed limit |
| Overpayment | Refunded above the base fee plus tip | Paid in full |
| Effect on ETH supply | Burn offsets new issuance | No burn |
The flexible block size is what makes the posted price work. When demand spikes, blocks temporarily grow instead of forcing everyone into a bidding war at once, and the base fee rises until demand cools back to the target.
Why Is EIP-1559 Important for Traders?
Burning fees turned transaction activity into a supply factor for ETH. Every transaction destroys some ETH, so busy periods remove more coins from circulation, and more than 1 million ETH was burned within about three months of London. After the Ethereum Merge cut new issuance in 2022, the burn could exceed issuance during periods of heavy use, making ETH supply shrink.
That link runs both ways. When on-chain activity is low, or when users move to Layer 2 networks that post data to Ethereum cheaply, the burn falls and net ETH supply grows again. A trader treating the burn as a guaranteed deflationary force misses that it depends entirely on demand for Ethereum’s block space.
EIP-1559 also has limits as a fee fix. It made gas fees easier to predict, but it did not add capacity, so fees still climb whenever demand exceeds what blocks can hold. The tip still works as a priority auction during spikes, which keeps room for bots and MEV searchers to outbid ordinary users.
Key Takeaways
- EIP-1559 replaced Ethereum’s blind fee auction with a base fee set by the protocol, plus an optional tip to the validator.
- The base fee adjusts by up to 12.5% per block, rising when blocks are fuller than the target and falling when they are emptier.
- Burning the base fee removes ETH from circulation and stops validators from gaming fees with their own transactions.
- The burn makes ETH supply depend on network activity, so heavy use can make supply shrink while quiet periods let it grow.
- EIP-1559 made fees more predictable but not cheaper, because it did not increase how much a block can hold over time.
Did EIP-1559 make Ethereum fees cheaper?
No. It made fees more predictable, not lower, because fees still rise when demand for block space exceeds supply. Lower fees came from Layer 2 networks and later data upgrades.
Why does Ethereum burn the base fee instead of paying validators?
If validators received the base fee, they could stuff blocks with their own transactions to push it up and collect it back. Burning removes that incentive and ties the fee to real demand.
What is the difference between max fee and priority fee?
The priority fee is the tip you offer the validator per unit of gas. The max fee is the highest total you will pay per unit, covering both base fee and tip, and anything unused below that cap is refunded to you.
Can the base fee ever reach zero?
In practice no. It falls by up to 12.5% after each block that is less than half full, but it never drops below a small floor, and demand usually pushes it back up long before that.
